fix: client.client_id cannot be set to taken value

fixed the bug which allowed to set multiple client ids to the same value

pyclasher/client.py

@@ -189,9 +189,17 @@ def client_id(self):
 
  @client_id.setter
  def client_id(self, new_id):
+ global client_id
+ if isinstance(new_id, str) and new_id.isdigit():
+ new_id = int(new_id)
+
  if not isinstance(new_id, (int, str)):
  raise TypeError(f"Expected types int, str got {type(new_id)} "
  f"instead.")
+ for client in Client.__instances:
+ if client.client_id == new_id:
+ raise ValueError(f"`new_id` {new_id} has already been taken "
+ f"and must be different")
  self._client_id = new_id
  return